| Let's Paint | Landscaping | facebook.com |
| Lettrage Electro Gm Enr | Auto Body Shop | — |
| LF5E Mini | Fitness Gyms | facebook.com |
| Lgm Renovation | Home Improvement | facebook.com |
| Lgr Peinture Inc | Painters | — |
| Liborio Paci | Car Insurance | facebook.com |
| LIEBHERR AEROSPACE CANADA | Aerospace | liebherr.com |
| Lifestyle Gym | Fitness Gyms | lsfgym.com |
| Lila Terbaoui | Car Detailing | — |
| Limakdéco | Bathroom Renovations | limakdeco.com |
| Limousine La Belle Province | Chauffeur Services | facebook.com |
| Limousine Marano | Chauffeur Services | — |
| Limousine Président Inc | Chauffeur Services | limousinepresident.com |
| Limousine Présidentielle | Chauffeur Services | facebook.com |
| Linda Styliste/Modeliste Vetements | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Linde Canada Limitée | Carbon Dioxide | lindecanada.com |
| Linteau Électrique Inc | Electricians | — |
| Lippe Jacques | Business & Trade Organizations | — |
| Liquid Details Mobile Auto Detailing | Car Detailing | — |
| Lisa Di Domenico CO | Career Counselling | facebook.com |
| Lobe Chomedey | Audiologists | lobe.ca |
| Local 21 Inc. | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Location Caravane Leblanc | Tout Commerces au détail | locationleblanc.ca |
| Location D'Auto Imperial Inc | Car Leasing | — |
| Location d'outils A1 Inc | Compressors | loca1.ca |
| Location d'outils Brossard inc. | Compressors | loutec.com |
| Location d'Outils MS | Compressors | locationoutilsms.com |
| Location Festi-Fêtes | Balloons | partyexpert.ca |
| Location Festi-Fêtes | Balloons | festifetes.ca |
| Location Idéal CH Ltée | Compressors | locationideal.com |
| Location Lalonde | Car Leasing | — |
| Loclasse | Advertising Agencies | loclasse.com |
| LOGANITON LACONIAS, ASSOCIATION | Blue Pages | — |
| Loge Laval | Tout Communautés et société | logelaval139.org |
| Logi-D | Life Sciences and Health Technologies (LSHT) | logi-d.net |
| LOGICIELS UPLAND INC | Information Technologies (IT) | uplandsoftware.com |
| Lordia Catering | Caterers | traiteurlordia.com |
| Loue La Vie | Car Leasing | — |
| Louise Savard - La Petite Sorcière | Astrologers & Psychics | facebook.com |
| Lovato Electrique Corporation | Automation Systems & Equipment | lovato.ca |
| LP Technologies Inc | Anodizing | lptech.ca |
| Lucien Couture | Couture, COUTURE | — |
| Lumax | Automation Systems & Equipment | — |
| Lys Air Mécanic Inc | Air Conditioning Contractors | lysair.ca |
| Lysair | Air Purifiers | lysair.ca |
| M & J Lessard | Air Conditioning Contractors | mjlessard.ca |
| M Couture | Couture, COUTURE | — |
| M Couture | Couture, COUTURE | — |
| M S Auto Location | Auto Body Shop | — |
| M T Électronique | Car Remote Starters | mtelectronique.com |
